# WARN akka.stream.Materializer \[akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)\] \[\] - \[outbound connection to, control stream\] Upstream failed, cause: StreamTcpException: The connection has been aborted **URL:** \ **Category:** Akka Cluster\ **Created:** [January 28, 2020, 11:04pm UTC](https://discuss.akka.io/t/warn-akka-stream-materializer-akka-stream-log-akka-cluster-system-materializers-streamsupervisor-1-outbound-connection-to-control-stream-upstream-failed-cause-streamtcpexception-the-connection-has-been-aborted/5821 "2020-01-28T23:04:05Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Twillouer](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.akka.io/twillouer/32/251_2.png) [@Twillouer](https://discuss.akka.io/u/Twillouer)\ **Post date:** [January 28, 2020, 11:04pm UTC](https://discuss.akka.io/t/warn-akka-stream-materializer-akka-stream-log-akka-cluster-system-materializers-streamsupervisor-1-outbound-connection-to-control-stream-upstream-failed-cause-streamtcpexception-the-connection-has-been-aborted/5821/1 "2020-01-28T23:04:06Z")
Hi, on a “moderate” cluster of 60 jvm, we got, for a day, multiple > WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] - [outbound connection to, control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted occurred. We use akka cluster on two DC, but without “cluster DC”. Connection are pretty fast between DC. example for a day : ```auto 2020-01-27 01:16:14,224 -1.15.26 [Cluster-akka.actor.default-dispatcher-5001] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server2-dc1:33649], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 03:09:18,065 -1.15.26 [Cluster-akka.actor.default-dispatcher-5113] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc1:35745], control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 03:09:18,065 -1.15.26 [Cluster-akka.actor.default-dispatcher-5113] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc1:35745], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 07:39:00,734 -1.15.26 [Cluster-akka.actor.default-dispatcher-5395] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc1:35951], control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 07:39:00,734 -1.15.26 [Cluster-akka.actor.default-dispatcher-5395] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc1:35951], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 11:05:38,602 -1.15.26 [Cluster-akka.actor.default-dispatcher-5612] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server5-dc1:2552], control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 11:05:38,602 -1.15.26 [Cluster-akka.actor.default-dispatcher-5612] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server5-dc1:2552], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 11:56:11,783 -1.15.26 [Cluster-akka.actor.default-dispatcher-5655] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc2:30115], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 11:56:11,785 -1.15.26 [Cluster-akka.actor.default-dispatcher-5655] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc2:30115], control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 12:41:55,584 -1.15.26 [Cluster-akka.actor.default-dispatcher-5711] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server1-dc2:25873], control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 12:41:55,585 -1.15.26 [Cluster-akka.actor.default-dispatcher-5711] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server1-dc2:25873], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 15:11:47,983 -1.15.26 [Cluster-akka.actor.default-dispatcher-5862] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server1-dc1:35901], control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 15:11:47,983 -1.15.26 [Cluster-akka.actor.default-dispatcher-5862] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server1-dc1:35901], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 15:36:29,761 -1.15.26 [Cluster-akka.actor.default-dispatcher-5888] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc2:38309], control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 15:36:29,761 -1.15.26 [Cluster-akka.actor.default-dispatcher-5888] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc2:38309], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 16:59:10,164 -1.15.26 [Cluster-akka.actor.default-dispatcher-5962] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc1:38853], control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 16:59:10,165 -1.15.26 [Cluster-akka.actor.default-dispatcher-5962] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc1:38853], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 20:16:07,863 -1.15.26 [Cluster-akka.actor.default-dispatcher-6141] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc2:2552], message stream] Upstream failed, cause: StreamTcpException: The connection has been aborted 2020-01-27 20:16:07,864 -1.15.26 [Cluster-akka.actor.default-dispatcher-6141] WARN akka.stream.Materializer [akka.stream.Log(akka://Cluster/system/Materializers/StreamSupervisor-1)] [] - [outbound connection to [akka://Cluster@server3-dc2:2552], control stream] Upstream failed, cause: StreamTcpException: The connection has been aborted ``` We use Akka 2.6.1, Artery on TCP. Everything seems normal and good, but this warning is a little bit strange ! ---
**Author:** ![Twillouer](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.akka.io/twillouer/32/251_2.png) [@Twillouer](https://discuss.akka.io/u/Twillouer)\ **Post date:** [January 30, 2021, 10:05pm UTC](https://discuss.akka.io/t/warn-akka-stream-materializer-akka-stream-log-akka-cluster-system-materializers-streamsupervisor-1-outbound-connection-to-control-stream-upstream-failed-cause-streamtcpexception-the-connection-has-been-aborted/5821/2 "2021-01-30T22:05:28Z")
Hi, it continue. Any clue ? ---
**Author:** ![Twillouer](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.akka.io/twillouer/32/251_2.png) [@Twillouer](https://discuss.akka.io/u/Twillouer)\ **Post date:** [May 9, 2021, 10:40pm UTC](https://discuss.akka.io/t/warn-akka-stream-materializer-akka-stream-log-akka-cluster-system-materializers-streamsupervisor-1-outbound-connection-to-control-stream-upstream-failed-cause-streamtcpexception-the-connection-has-been-aborted/5821/3 "2021-05-09T22:40:11Z")
Hi, I’ve got ~60 messages like this for a day (on only one service). Any idea ? ---
**Author:** ![jsarrelli](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.akka.io/jsarrelli/32/2342_2.png) [@jsarrelli](https://discuss.akka.io/u/jsarrelli)\ **Post date:** [May 14, 2021, 2:37pm UTC](https://discuss.akka.io/t/warn-akka-stream-materializer-akka-stream-log-akka-cluster-system-materializers-streamsupervisor-1-outbound-connection-to-control-stream-upstream-failed-cause-streamtcpexception-the-connection-has-been-aborted/5821/4 "2021-05-14T14:37:33Z")
Same issue here ---
**Author:** ![Shiva](https://avatars.discourse-cdn.com/v4/letter/s/85e7bf/32.png) [@Shiva](https://discuss.akka.io/u/Shiva)\ **Post date:** [May 17, 2024, 4:46am UTC](https://discuss.akka.io/t/warn-akka-stream-materializer-akka-stream-log-akka-cluster-system-materializers-streamsupervisor-1-outbound-connection-to-control-stream-upstream-failed-cause-streamtcpexception-the-connection-has-been-aborted/5821/5 "2024-05-17T04:46:55Z")
Any one find the cause of this warning and fix?